What is a temporary measure used for surgical correction of interrupted aortic arch?

The correct answer is pulmonary artery banding, which serves as a temporary measure for the surgical correction of interrupted aortic arch. This procedure involves placing a band around the pulmonary artery to restrict blood flow. The additional resistance created by the band helps to increase the flow of blood to the aorta by redirecting it through the ductus arteriosus (PDA) to supply blood to the lower body when the aorta is not properly connected.

This measure is particularly beneficial in neonates or infants with interrupted aortic arch, providing time for the patient to stabilize before undergoing definitive surgical repair of the arch. It aids in maintaining appropriate systemic perfusion while managing the condition until a more permanent solution can be implemented.

One might confuse other options like PDA closure or aortic balloon dilation with temporary corrective measures. However, PDA closure would eliminate an important collateral pathway in the case of interrupted aortic arch, and aortic balloon dilation is generally reserved for conditions such as stenosis rather than interruptions. Meanwhile, coronary artery bypass grafting is unrelated to this specific cardiovascular anomaly, as it primarily addresses issues with coronary artery disease rather than structural defects in systemic circulation.